[Email Security] Update URL rewrite ignore patterns (#23789)

Author: Maddy-Cloudflare

src/content/docs/cloudflare-one/email-security/detection-settings/configure-link-actions.mdx

@@ -22,7 +22,8 @@ To configure link actions:
 You can add patterns for URLs that should be rewritten.
 
 1. Under **URL rewrite ignore patterns**, select **Add a pattern**.
-2. Choose **URL defang** (to allow links to be clickable), or **No action** (for no action to be taken on the link).
+2. Enter a valid IP, URL, or regular expression. You can enter up to 512 characters.
+3. Select **Save**.
 
 To edit a pattern, go to the pattern you want to edit, select the three dots, then **Edit**. Once you have finished modifying the URL patter, select **Save**.